Zoology IAS Paper 2 UPSC 2024 with Solutions

Zoology Paper 2 UPSC 2024 - Question Paper with Solutions 

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SECTION-A

1. Write on the following in about 150 words each: 

Zoology 1a Polytene chromosome. (2024/10 Marks)

Zoology 1b Difference between male heterogamety and female heterogamety with examples. (2024/10 Marks)

Zoology 1c Types of chromosomal aberrations. (2024/10 Marks)

Zoology 1d Geographic versus reproductive isolation. (2024/10 Marks)

Zoology 1e Main types of molecular mutations and their effect on phenotype. (2024/10 Marks)

Zoology 2a Give an account of ultrastructure of rough and smooth endoplasmic reticulum. Also discuss the role of endoplasmic reticulum in cell secretion. (2024/20 Marks)

Zoology 2b Distinguish between heterochromatin and euchromatin in their structure and function with examples. (2024/15 Marks)

Zoology 2c What are signal molecules? How do defects in signalling pathway cause pathological changes? (2024/15 Marks)

Zoology 3a What is sex-determination? Give an account of genic balance theory of sex-determination in Drosophila with examples from abnormal karyotypes. (2024/20 Marks)
Zoology 3b What is DNA replication? Describe the process of DNA replication in prokaryotes. (2024/15 Marks)
Zoology 3c Discuss gene regulation mechanisms in E. coli. (2024/15 Marks)

Zoology 4a Describe the stages of human evolution and mention the major hominid forms giving their time of origin. (2024/20 Marks)

Zoology 4b What is Hardy-Weinberg law? How is gene frequency changed by mutation and genetic drift in populations? (2024/15 Marks)

Zoology 4c What is the difference between systematics and taxonomy? Differentiate between classical and molecular taxonomy with the tools used. (2024/15 Marks)

SECTION-B

5. Write on the following in about 150 words each: 

Zoology 5a Functions of immunoglobulins. (2024/10 Marks)

Zoology 5b ABO system of blood groups and its basis, and erythroblastosis foetalis. (2024/10 Marks)

Zoology 5c Olfactory pathways and physiology of olfaction. (2024/10 Marks)

Zoology 5d i Gastrulation in frog. (2024/5 Marks)

Zoology 5d ii Biogenetic law. (2024/5 Marks)

Zoology 5e i Stem cells. (2024/5 Marks)

Zoology 5e ii Types of placenta among mammals. (2024/5 Marks)

Zoology 6a Explain the structure of nephron and its role in urine formation. Add a note on hormonal regulation of urine formation. (2024/20 Marks)

Zoology 6b Classify hormones and write down the process of steroid hormone biosynthesis. (2024/15 Marks)

Zoology 6c What do you mean by teratogenesis? Explain the genetic and induced teratogenesis. (2024/15 Marks)

Zoology 7a Describe the process of spermatogenesis. Add a note on the role of Golgi bodies in the formation of acrosome. (2024/20 Marks)

Zoology 7b Why are vitamins also called coenzymes? Justify. (2024/15 Marks)

Zoology 7c Explain the mechanism of contraction in skeletal muscle. What do you mean by Rheobase and Chronaxie? (2024/15 Marks)

Zoology 8a Write about the role of liver and pancreas in digestion. Add a note on neural and hormonal regulation of their secretions. (2024/20 Marks)

Zoology 8b Discuss the role of oxidative phosphorylation in cellular and tissue metabolism. (2024/15 Marks)

Zoology 8c Describe the organogenesis of eye. (2024/15 Marks)